On Sun, Apr 21, 2013 at 5:46 AM, sunil virmani <sunhcl(at)gmail(dot)com> wrote:
> My DB version is little old - 8.1.18.
>
Your db is exceptionally old and very much unsupported. Vacuum has
massively improved since 8.1 .
See http://www.postgresql.org/support/versioning/ regarding supported
versions.